Band tightening device



G. L. MCKEE BAND TIGHTENING DEVICE l Filed Aug. '7, 1942 Nov. 16, 1943.

Glenn L. mn

Patented Nov. 16, 1943 omen fsf-mes Glenn L. Mc-Keeyakersleld, Calif., assgnor to Y McKee Bros.H Corporation-,VBakersfeld, Calih,

My invention relates toa banding lcita/ice adapted for tightningka' band" around notoiily circular' but also' irregularly shaped articles. Im*- por'tant uses or' the invention include the tight` ening of' bands around posts", ties, containers, and groups of articles, aswell as around hose'.

An important object ofthe invention isto provide means whereby airv may be excluded from the hydraulic operating means, whereby" the mechanism may be entirely operated by a noni compressible element, tov'wit; liquid.

Another' object of the invention is* toA provide means -for slightly releasing tension" onv theband Without releasing the' grip thereon; whereby' the tool may be turned to eiec't an angularbendin the band. n

The present tool' is: adapted: for drawinga band through aclip surrounding Vthe band, such as shown yin United States Letters PatentA No. 2,163,043, issu-d'Jurier 20; 1939', n Band: clarnp. In drawing the band" through a clip, such as shown in my said patent; considerable pressure is exerted on the clip that surrounds the bandgyand there is danger of distortion'of the clip by expansion under such pressure.v Itis an important-ob@ ject of my present invention to' provide means for preventing saidl distortion; l

The invention also vcomprises novel details* of construction arid novel combinations and arrangements of parts, which will-more fully ap*- pear in the course' of the following description. In the drawing, Alike reference characters designate-similar parts' in-the several views'.M

Figure l is a broken-section, partly in plan?, of an embodiment of the present invention'.l

Figure 2'is a sectionrtaken'ontheV line 2"-2 of Figure 4 is-a section taken on the line of Figure 1.

Referring more in details to the drawing; a Y

hose is screwedl intoal head 5| which iswelded in an end of a cylinder 52.- Piston rod or rain 5:3recipr`ocates inthe cylinder 52. `l A ilowlin'e 54L connects they hose `virithlthei'nterior ofthe'cylinderv 521 Ashank 55 on the' end of thel pistonrodl sa carries keepers-'ss and si which respectivelyI carry endless coil springs 5B and 59. The end's'of each coil spring' arewelded isfcutawy, as:lestfsliovirii iii-'Fig'r- 35 semi-cylindrical shearing member 96.

I ening the band in position.

opposed edges of the shearing bar andof the cylindrical bore 95.

In the operation of my devicefthe first impor-V tant step is the provision of air-free liquid for the mechanism by excluding air from the portions occupied by the pressure liquid. To remove air from the line 54, the plug 64 is removed after the' piston rod 53 has been drawn forwardly until its piston head is against the end 19. In this position the plug 64 is forwardly beyond the clamping head 19 and thus freely accessiblefor removal. Pressure is then applied to liquid in the hose 58, driving the liquid through the associated parts until the liquid flows out at the opening normally closed by the plug 64. The plug 64 is then replaced and thepiston rod 53 shifted toits normal rear position as in Fig. l. During this step needle valve 65 is closed.

To remove air pockets from the passage 66, the screw 16 is removed and the needle valve 65 opened. Movement of the piston rod 53 will cause liquid to flow through the hollow stem 15. During this flow the screw 16 is replaced thus excluding air pockets from the portion of the liquid that is placed under tension.

In the use of the present device, the band 9| is placed around the article or group of articles desired'to be banded. The clip 94 is inserted in the recess 93. During the tightening step, the lever 98 is in the position shown in Figure 2. By rotation of the Varm 85, the block 88 clamps the end of the band 9| against the face 89, to hold the band against slippage. Y,

Then to tighten the band, pressure is applied through the hose50 to the line 54. Pressure in the line 54 drives the head5| andcylinder A52 ,to the right, as they are illustrated in Figure 1. In this operation, the cylinder instead of the piston is moved. lDuringthelongitudinal movement of the cylinder 52, the clamping block 88 draws the band through the clip 94, thus tight- When the band is tightened a desired amount, the device may be swung upwardly at right angles to the position shown in Figure 2 by releasing Vthe needle valve 65 (which to the present time y has remained closed).

Opening the needle valve BEV-slightlyv releases -the liquid pressure since the coil spring 14 permits the plunger 1I to recede slightly. ,Thisrelease of pressure is sufficient to permit the swing- .ing movement of the device heretofore mentioned. v l

After the device has been swung to said right angle position, the band may be sheared by swinging the lever 98 in the direction of the ar- I now regard as the preferred embodiment of vmy invention, theconstruction is, of course,sub ject to modifications without departing fromthe spirit of my invention. I, therefore, do not wish to restrict myself to the particular form of construction illustrated and described, but desire to avail myself of all modic-ations which may fall Within the scope of the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. In a device for tightening a banding means having relatively movable band and clip eleloY ments, a member for receiving the clip, having aforward clip receiving recess and a band rcceiving slot, the .slot being narrower than the recess, to receive the band element but exclude the clip element,'a second member including clamping means for engaging a band extending through the said slot, and means to move the second member relative to the first member, to

Vmove the yband clamping means relative to the clip receivingv member, the said clip receiving recess being arranged to recess and laterally conne a portion of a clip.

2. In a device for tightening a banding means having relatively movable band and clip elements, a nose member having a relatively narrow slot to receive the band but exclude the clip, and having a forward clip receiving recess widerl than the slot located at the front of the slot, to lreceive and laterally corinne the clip to prevent same from spreading and distortion under pressure, clamping means for a band extending vthrough the slot of the head, and means to move the clamping means relative to the nose member, to move the clamped band relative to the clip, the said recess opening upwardly for vertically swinging movement of the nose member and clamping means relative to the clip.

3. ,In a device for tightening a banding means having relatively movable band and clip elements, a nose member having a relatively narrow slot to receive the band but exclude the clip, laterally spaced forward projections carried by the nose member at the forward end of the slot and spaced from at least one side of the slot, to receive and laterally confine the clip therebetween and prevent the spreading and distcrtion of the clip under pressure, clamping means for a band extending through the slot of the head, and means to move the clamping means relative to the nose member, to move the band relative to the clip, the said clip receiving projections forming an upwardly opening recess to thus permit vertical swinging movement of the nose member and clamping means relative to the clip.

4. In a device for tightening a banding means having relatively movable band and clip elements, a clamping head having a clamping surface, a clamping member carried thereby and movable toward and away from said surface for clamping a band thereon, a rod slidable axially through said head, a nose member on the forward end of the rod having. agband receiving slot the base of which is norm'allyalinedwith the clamping surface of the head,`means carried by the forward portion of the ncs'e'm'ember at the front end of its slot and forming a clip receiving and confining recess-open at its top to thus pei'- mit vertical `swinging movement of the nose member and clamping head relative to the clip,

and means `for causing relative movement of the *rod and head to thus shift the latter relative to 

